Vulnerability Monitor

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CVE-2011-4868

The logging functionality in dhcpd in ISC DHCP before 4.2.3-P2, when using Dynamic DNS (DDNS) and issuing IPv6 addresses, does not properly handle the DHCPv6 lease structure, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via crafted packets related to a lease-status update.

Security Impact Summary

CVE-2011-4868 is a security vulnerability that . Impacting 1 product from isc organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2012, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2012-01-15T03:55:12.953

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 6.1 (MEDIUM)

CVSSv2 Vector

AV:A/AC:L/Au:N/C:N/I:N/A:C

Access Vector: ADJACENT_NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

6.5

Impact Score

6.9

Weaknesses

Type: Primary
CWE-399

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	isc	dhcp	≤ 4.2.3	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.2	Yes
Application	isc	dhcp	3.0.2	Yes
Application	isc	dhcp	3.0.2	Yes
Application	isc	dhcp	3.0.2	Yes
Application	isc	dhcp	3.0.2	Yes
Application	isc	dhcp	3.0.3	Yes
Application	isc	dhcp	3.0.3	Yes
Application	isc	dhcp	3.0.3	Yes
Application	isc	dhcp	3.0.3	Yes
Application	isc	dhcp	3.0.4	Yes
Application	isc	dhcp	3.0.4	Yes
Application	isc	dhcp	3.0.4	Yes
Application	isc	dhcp	3.0.4	Yes
Application	isc	dhcp	3.0.4	Yes
Application	isc	dhcp	3.0.5	Yes
Application	isc	dhcp	3.0.5	Yes
Application	isc	dhcp	3.0.6	Yes
Application	isc	dhcp	3.1.0	Yes
Application	isc	dhcp	3.1.0	Yes
Application	isc	dhcp	3.1.0	Yes
Application	isc	dhcp	3.1.0	Yes
Application	isc	dhcp	3.1.0	Yes
Application	isc	dhcp	3.1.0	Yes
Application	isc	dhcp	4.0.0	Yes
Application	isc	dhcp	4.0.0	Yes
Application	isc	dhcp	4.0.0	Yes
Application	isc	dhcp	4.0.0	Yes
Application	isc	dhcp	4.0.0	Yes
Application	isc	dhcp	4.0.0	Yes
Application	isc	dhcp	4.0.0	Yes
Application	isc	dhcp	4.1.0	Yes
Application	isc	dhcp	4.1.0	Yes
Application	isc	dhcp	4.1.0	Yes
Application	isc	dhcp	4.1.0	Yes
Application	isc	dhcp	4.2.0	Yes
Application	isc	dhcp	4.2.0	Yes
Application	isc	dhcp	4.2.0	Yes
Application	isc	dhcp	4.2.0	Yes
Application	isc	dhcp	4.2.0	Yes
Application	isc	dhcp	4.2.0	Yes
Application	isc	dhcp	4.2.1	Yes
Application	isc	dhcp	4.2.1	Yes
Application	isc	dhcp	4.2.1	Yes
Application	isc	dhcp	4.2.2	Yes
Application	isc	dhcp	4.2.2	Yes
Application	isc	dhcp	4.2.2	Yes
Application	isc	dhcp	4.2.3	Yes

References

http://security.gentoo.org/glsa/glsa-201301-06.xml ([email protected])
https://deepthought.isc.org/article/AA-00595 ([email protected])
https://kb.isc.org/article/AA-00705 ([email protected])
https://www.isc.org/software/dhcp/advisories/cve-2011-4868 Vendor Advisory ([email protected])
http://security.gentoo.org/glsa/glsa-201301-06.xml (af854a3a-2127-422b-91ae-364da2661108)
https://deepthought.isc.org/article/AA-00595 (af854a3a-2127-422b-91ae-364da2661108)
https://kb.isc.org/article/AA-00705 (af854a3a-2127-422b-91ae-364da2661108)
https://www.isc.org/software/dhcp/advisories/cve-2011-4868 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For isc's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.